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Hydroids
Last updated on November 17th, 2023
About Hydroids
Hydroids are a very small jellyfish that looks like a small sprouting aiptasia. Hydroids can attach to nearly any surface and can be very difficult to treat.
How to Prevent Hydroids
Hydroids tend to hitchhike on baby brine shrimp, copepods, plankton, or rotifers. If you feed these to creatures such as seahorses or filter feeders, you may not be able to avoid hydroid. In this case you will focus on treating the hydroids. The best prevention method is to avoid these foods when possible.
How to Get Rid of Hydroids
The best way to get rid of hydroids is to remove the rock and manually remove them. If you are unable to eraticate them this way, you may have to treat using fenbendazole. If you do, you will want to remove the rock and treat outside of the tank as this will kill other coral and everything this medication comes in contact with will be contaminated.
At this point, I think your best bet is to simply replace the rock because using fenbendazole may leech into the tank. Some people have found that treatments similar to that of aiptasia have worked. Solutions such as kalk paste and Frank's F-Aiptasia have helped others.
What Eats Hydroids
There is nothing that reliably eats hydroids. That being said, there have been people that have reported kliens butterflyfish and urchins have eaten hydroids. This is not common, but may be worth trying.
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